<style>
    h1{
    color: blue;font-size: 50px;
    }
    #马保国{
        color: brown;font-size: 30px;
    }
    .Nice{
        color: chocolate;font-size: 20px;
    }
</style>

<h1>年轻人</h1>
<h1 id="马保国">闪电五连鞭</h1>
<h1 class="Nice">不讲武德</h1>


